“Daring ideas are like chessmen moved forward. They may be beaten, but they may start a winning game.”
“It was like when you make a move in chess and just as you take your finger off the piece, you see the mistake you've made, and there's this panic because you don't know yet the scale of disaster you've left yourself open to.”
“All this twaddle, the existence of God, atheism, determinism, liberation, societies, death, etc., are pieces of a chess game called language, and they are amusing only if one does not preoccupy oneself with 'winning or losing this game of chess.”
“In chess, as a purely intellectual game, where randomness is excluded, - for someone to play against himself is absurd ...
It is as paradoxical, as attempting to jump over his own shadow.” 
“When you see a good move, look for a better one”
“A king may be the most important piece on the chessboard, however, the queen is the most powerful.”
“Strategy requires thought tactics require observation.”
“You yourself must learn to master your emotions, and never be influenced by anger.”
“Chess is everything: art, science, and sport.”
“Chess is life in miniature. Chess is a struggle, chess is a battle.”
“The goal of chess is not to make a move; it is to foresee the plan of your opponent.”
“Some people think that if their opponent plays a beautiful game, it’s okay to lose. I don’t. You have to be merciless.”
“By the beauty of chess, I mean exactness, harmony, hidden possibilities. Beauty, which only a true connoisseur who understands the intricacies of the game can appreciate.”
“I have come to realize that chess is not just a game. It is a science and an art, governed by the laws of logic.”
“I don’t believe in psychology. I believe in good moves.”
“Win with grace, lose with dignity.”
“To improve at chess you should in the first instance study the endgame.”
“Chess is ruthless: you’ve got to be prepared to kill people.”
“In chess, as in life, opportunity strikes but once.”